Clinical-thermometer tubing



' A ri l 28, 1925.

M. NODA CLINICAL THERMQMETER TUBING Filed March l6 1921.

INVENTOR BY ATTORNEYS Q 09am Q Patented Apr. 28, 'lg fi, I

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Application filed Marc11'16,.1921. Serial No. 452,670.

To all whom it may concern: Be it known that I, MA'rsUsAnURo Now, a subject of the Emperor of Japan, and-residing at New York, in the county and State of New York, have madea certain new. and useful Invention in Clinical-Thermometer Tubing, of, which the following is a specification. 1

This invention relates to a newronstruction of prismatical clinical thermometer tubing,

The object of the invention is to provide a prismaticahclinical thermometer tubing, in which the mercury controlled by the temperature can be seen very easily, thereby greatly facilitating the readings taken from the thermometer.

A'further object of the invention is to provide in a thermometer'of the character set forth, means whereby the reflection of mercury may be utilized to effect facility in reading.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and rela-' tive arrangement of parts, all as will be more fully hereinafter set forth, as shown by the accompanying drawing, and finally pointed out in the appended claims.

Referring to the drawings,

F/ig. 1 is a view in elevation of a fragment of the thermometer .embodying my invention; v Fig. 2 is a sectional View of the same taken on the line 2-2 of Figa- 1, and looking in the direction of the arrows.

The same part is designated by the same reference character wherever it occurs throughout the two views.

In accordance with my invention, I pro-' vide a tubing preferably of glass, and preferably substantially triangular in cross sec.- tion, in which A is theapex of the substantiallytriangular structure, the other corfiners of which are designated B and G,

whereby it will be apparent that the sides.

A, B, ;-A, G, are formed thereby with base portion B, C. While I do net-desire to be limitedor'restricted to the specific details of construction, I prefer tor'fiake the sides A, B, and A, C, substantially flat, whereas the shape of the base B, G, is immaterial, and may be fiat, as in the .case of the sides A, C, and A, B, or may be slightly curved as shown. 'At the-center of thetriangular glass tube structure is located the capillary tube D, behind which, as a reflector, theref' r'," is a member G, preferably ma'demilky w ite in color, and may be formed of glass or any other suitable material as desired. The purpose of the member G is to reflect the mercury K contained in' the capillary tube D, by means of the projecting lights which come through the sides A, B, and A, C, in accordance with the prismatic reflecting light, so as to give an int nsely magnified vmercury column reading at- E, F, thereby -mometer structure wherein the reading of the mercury is greatly facilitated on account of the reflection of the mercury itself, and

the location of which is greatly facilitated.

by the lines of definition, for example, the red lines I-I-H. By means of these colored parallel lines at the reflecting surface ofthe mercury column, an effective target is obtained.

Many modifications and changes in details will readily occur tothose skilled in the art without departing from the spirit and scope of my invention. Therefore, what I claim as new and useful-and of my own invention and desire to secure by Letters Patent is:

1. A prismatical thermometer comprising a substantially triangular transparent body, a mercury tube positioned in said body at the approximate center thereof, means forming a reflecting surface positioned behind said tube and extending substantially the length of the base of the triangular body, guide lines in said body on o posite sides of the mercury tube parallel t erewith for guiding the eye and index marks located near the apex of said triangular body for reading the position of the mercury column.

2. A clinical thermometer comprising-a prismatical body" having one face slightly curved, a n'iercury tube in said body, means forming a reflecting surface located Within the prism near said curved face, colored guide lines in said body opposite said reflecting means whereby said mercury read- 10 ing is-magnified and shown between said guide lines for easy reading.

In testimony whereof I have hereunto set my hand on this 1% day of March A. 1).,

MATSUSABURO NODA. 

